SDN4-24-100LP

**3** Power Supplies ~~= 7~~ 

## SDN™ Series Redundant Options 

The SDN Series standard options allow for operation in a wide variety of applications. With the addition of an external redundancy module, the SDN can also be used for true redundant operation including 2N and N+x configurations. 

All SDN units include built in current sharing for parallel and redundant operation. The external modules SDN 2.5-20RED and SDN 30/40RED increase the reliability by isolating the supplies and adding more signal options. Paralleling for increased power does not require the use of these modules. 

## Module Compatibility 

Two separate modules are available to provide the maximum flexibility in size, cost and signaling capability. Refer to the chart below for information on which module can be used for each SDN power supply. 

Power Rating – A simple Yes or No indication that this module can or cannot handle the power rating of that power supply. 

## Features 

- DC OK Relay Contact 

Input/Output Signals – Yes indicates that each power supply would have an independent relay contact to provide power supply status, and the DC bus output from the redundant module has it’s own DC OK relay contact. Output only indicates that only the output of the redundant module would have a DC OK relay contact. 

- True Isolation 

- High availability 

- SDN features and quality 

## Related Products 

- SDN™ Series 

## Applications 

- Process Control 

- Remote Location 

- Critical Production 

Redundancy Module Compatibility Chart 

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Single Phase SDN Series<br>SDN 5-24-100P SDN 10-24-100P<br>SDN 2.5-24-100P * SDN 4-24-100LP * SDN 20-24-100C<br>—— SDN 5-24-100C SDN 10-24-100C<br>Power Rating a Yes Yes Yes Yes Yes<br>SDN 2.5-20RED<br>Input / Output Signals Yes Yes Yes Yes Yes<br>Power Rating Yes Yes Yes Yes Yes<br>SDN 30/40RED<br>——— Input / Output Signals Yes Yes Yes = Yes Yes<br>Three Phase SDN Series<br>SDN 5-24-480C SDN 10-24-480C SDN 20-24-480CC SDN 40-24-480C<br>po Po<br>Power Rating Yes Yes Yes No<br>SDN 2.5-20RED<br>Input / Output Signals Yes Yes Yes N/A<br>Beee Power Rating Yes Pp Yes Yes Yes Yes<br>SDN 30/40RED<br>Input / Output Signals ee Yes Yes Yes Yes Yes<br>* Paralleling will violate Class 2 current limits.<br>**----- End of picture text -----**<br>


Contact **Technical Services** at **(800) 377-4384** with any questions. Visit our website at www.solahd.com. 

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SDN™ Redundant Series Specifications for SDN2.5-20RED and SDN 30/40RED 

**Catalog Number Description SDN 2.5-20RED SDN 30/40RED** ~~_~~ **Concept** By means of a separate redundancy module, you can interconnect several identical SDN power supply units in a N+1 redundant mode. These external modules decouple the power supply outputs from each other so that, in case of failure, one power supply unit cannot overload the other units. The modules incorporate DC OK relay contacts. The switch on front of the SDN power supply should be placed in parallel mode (not single mode) when power supplies are used with redundant module. **Electrical Characteristics** ~~CR~~ **Voltage** ~~a~~ **-Nominal Value** 24 Vdc **-Max. Rated** 35 V ~~esen~~ **Voltage Drop** ~~ee~~ **-Vin -> Vout** Typ. 0.6 V **Current Handling Capacity** ~~ey~~ **-Maximum Value** 20 A 40 A ~~ny~~ **Inverse Battery Protection** Yes **Connection** Via captive screw terminals ~~a~~ Solid: 16-10 AWG (1.5 - 6 mm[2] ) Solid: 16-5 AWG (1.5 - 16 mm[2] ) Stranded: 16-12 AWG (1.5 - 4 mm[2] ) Stranded: 16-8 AWG (1.5 - 10 mm[2] ) **-Connector size range** Note: GND must be connected to module for voltage monitor to operate properly. ~~CC PO~~ See Connectors and Wiring diagrams on next page. **Relay Contacts** ~~RC a~~ **DC Okay Contacts (qty) description** (1) Vout “OK” - N.O. & N.C. Contact (1) V(2) Vout in “OK” - N.O. Contact“OK” - N.O. Contact **-Voltage Set Point** > 18 Vdc ±5% **-Contact Rating** 30 Vdc @ 2A / 250 V @ 2A ~~|] es~~ **DC OK LED** Vout “OK” Green LED ~~es~~ **-Voltage Set Point** > 18 Vdc ±5% **Dimensions** 4.88 in x 1.97 in x 4.55 in 4.88 in x 2.56 in x 4.55 in **H x W x D - inches (mm)** (124.0 mm x 50.0 mm x 116.0 mm) (124.0 mm x 65.0 mm x 116.0 mm) ~~es~~ **Free Space for Ventilation -** Above/Below: 0.39 in. (10 mm) recommended ~~a~~ **inches (mm)** Left/Right: 0.39 in. (10 mm) recommended **Weight lbs (kg)** 1.4 (625.00) 1.4 (646.00) ~~rs errr) rr~~ **General** Storage: -25°C to +85°C Operation: -10°C to +60°C full power with operation to 70°C possible with a linear derating to half power from 60°C to 70°C (Convection cooling, no forced air required). Operation up **Ambient Temperature** to 50% load permissible with sideways or front side up mounting orientation. The relative humidity is < 90% RH, noncondensing. 

Contact **Technical Services** at **(800) 377-4384** with any questions. Visit our website at www.solahd.com. 

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Wiring Diagram for SDN 2.5-20RED 

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Single Single<br>Parallel Parallel<br>**----- End of picture text -----**<br>


Notes: 

1.  The Common (marked “COM -“) connection to the module is required for voltage monitoring (DC OK Contacts), and is not meant to be part of the current path from the power supply to the load. 

2.  Protective earth connection only provides protective ground to the metal case of the module. This connection is isolated from the positive and common connections. 

Contact **Technical Services** at **(800) 377-4384** with any questions. 

132 

Visit our website at www.solahd.com. 

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Wiring Diagram for SDN 30/40RED 

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**----- Start of picture text -----**<br>
Single<br>Parallel<br>Single<br>Parallel<br>**----- End of picture text -----**<br>


## Notes: 

1.  The Common (marked “COM -“) connection to the module is required for voltage monitoring (DC OK Contacts), and is not meant to be part of the current path from the power supply to the load. 

2.  Protective earth connection only provides protective ground to the metal case of the module. This connection is isolated from the positive and common connections. 

Contact **Technical Services** at **(800) 377-4384** with any questions. 

133 

Visit our website at www.solahd.com.